Articoli rivista
Didattica
Anno XLVI - n.4 - ottobre/dicembre 2013 Sul moto ellittico dei pianeti
A didactical approach to the elliptical motion of planets in the solar system is proposed. The planets’ velocities in apsidal points and the total mechanical energy of the two-body systems are discussed and described as functions of orbital parameters. Kepler’s third law is obtained from energy and angular momentum conservation principles. […]
Anno XXXI - n.3 - luglio/settembre 1998 Sull’orbita della luna
Understanding what the orbit of the Moon look like when viewed from the reference frame of the Sun presents some difficulties to highschool students. The approach described in this paper to the correct representation of the Moon’s trajectory is an example of how a physics problem can be schematized an simplified. […]
Anno XLVII - n.1 - gennaio/marzo 2014 Sulla scarica di un condensatore ovvero sulla difficoltà di fare modelli giusti
When is radiation important in the discharge of a capacitor? When is it negligible? The answer depends on many geometrical and physical parameters. Reasonable estimates and suitable approximations/schematizations find that the radiated energy is negligible compared to the Joule dissipation unless a small capacitance is used and the circuit is a loop comparable in size to the capacitor. […]
Anno XXIV - n.1 - gennaio/marzo 1991 Superconduttività ad alta temperatura
A short phenomenological description of the behaviour of the classic low-temperature superconductors is given. A brief history of the progresses achieved during the past half century in the search of “high temperature superconductors” introduces to the recent discovery of the new ceramic superconductors. […]
Anno XLV - n.1 - gennaio/marzo 2012 Tecniche di apprendimento attivo con esperimenti dimostrativi interattivi (Interactive Lecture Demonstrations – ILD) e l’uso di risponditori individuali (clickers)
Most introductory physics students spend the majority of their time in passive and often crowded lectures. Studies show that students learn little in such classes. The results of education research have led to the design of active learning environments (often making use of computer-assisted data acquisition tools). […]
Anno XXXI - n.1 - gennaio/marzo 1998 Tipi diversi di costanti in fisica e apprendimento significativo della disciplina
Data derived from teaching experience point to some problems referred to the conceptualization of constants that appear in relationship between physical magnitudes. Some significative problems are identified. Two general hypotheses and four derived hypotheses are formulated. In order to get more information some questionnaires are prepared. […]
Anno XXVI - n.4 - ottobre/dicembre 1993 Un’esperienza sul campionamento di un segnale.
Exploring signal sampling techniques through an optical experiment. The reconstruction of an optical image of a simple pattern matched to a diffraction grating is proposed as an example of data analysis by digital method. Correspondence between analysis of time dependent digital signals and of spatial digital functions is outlined. […]